A
B
C
D
Explanation
Correct answer: A.
Choice A is correct. The value of can be found by substituting for in the equation defining . Substituting for in yields , or . Therefore, the value of is .
Desmos solution:
Enter in Desmos:
Reviewed and rewritten by CookSAT
Why the other choices are wrong
Choice B
Choice B is incorrect. This is the value of , not .
Choice C
Choice C is incorrect and may result from conceptual or calculation errors.
Choice D
Choice D is incorrect and may result from conceptual or calculation errors.